Question

Given the species $N_2,CO,N{O}^{+}$ and $C{N}^{-}$ which of the following statements are true for this :
(I) All the species are diamagnetic
(II) All the species are isostructural
(III) All the species have identical bond order
(IV) More than one species have zero dipole moment

• A. I, II and III
• B. I, II, III and IV
• C. III and IV
• D. I and II

Answer 1

The correct option is B I, II, III and IV

All the four species are isoelectronic. They contain same number of electrons (14 electrons) . Hence, they are isostructural and have identical bond order. In these species, all the electrons are paired. Hence, they are diamagnetic. Due to presence of resonance structures, more than one species have zero dipole moment. Hence, all the four statements are true.